Stefan Richter created FLINK-5019:
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Summary: Proper isRestored result for tasks that did not write
state
Key: FLINK-5019
URL: https://issues.apache.org/jira/browse/FLINK-5019
Project: Flink
Issue Type: Bug
Reporter: Stefan Richter
Assignee: Stefan Richter
When a subtask is restored from a checkpoint that does not contain any state
(e.g. because the subtask did not write state in the previous run), the result
of {{StateInitializationContext::isRestored}} will incorrectly return false.
We should ensure that empty state is somehow reflected in a checkpoint and
return true on restore, independent from the presence of state.
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